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Finding the Fourth Proportional to 30,543.60, 45,844.20 and 18,879.60

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Solution

The fourth proportional to 30,543.60, 45,844.20 and 18,879.60 is: 28,337.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,543.60 : 45,844.20 = 18,879.60 : x
  2. Step 2: Convert to fraction form
    30,543.60/45,844.20 = 18,879.60/x
  3. Step 3: Cross multiply
    30,543.60x = 45,844.20 × 18,879.60
  4. Step 4: Simplify right side
    30,543.60x = 865,520,158.32
  5. Step 5: Solve for x
    x = 865,520,158.32/30,543.60
  6. Step 6: Final answer
    x = 28,337.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.